A recipe for making sunshine cake – Beat yolks of five eggs lightly, add one teaspoon of vanilla, or grated rind of one lemon. In another bowl beat seven whites to a froth with a scant one-half teaspoon of cream of tartar, then beat until whites are very stiff. Gradually add one cup of granulated sugar, sifted three times, to the beaten whites. Fold whites and sugar, when beaten, into the beaten yolks. Sift one cup of flour three times, then put into sifter and shake lightly, fold into the cake. Bake forty minutes in ungreased cake pan. As directed for sponge cake invert pan. Remove cake when it has cooled.